Helium Mesic Atom Production in Gaseous Mixture of Hydrogen with Helium; OBRAZOVANIE MEZOATOMOV GELIYA V GAZOVOI SMESI VODORODA S GELIEM
Technical Report
·
OSTI ID:4694971
In order to clarify the possibility of carrying out an experiment on /sup -/ capture in He/sup 3/ using small amounts of He mixed with H/sub 2/, the process of He mesic atom production in such a mixture was investigated. Use was made of a diffusion chamber filled with mixtures of H/sub 2/ and He/sup 4/ and H/ sub 2/ and He/sup 4/ with methyl alcohol as operating liquid, the nuclear concentrations of He/sup 4/ and He/sup 3/ being 4.9 and 14.3%, respectively. It is shown that the determination of the number of stars due to /sup -/ capture by C, O, and He at two different concentrations of the He together with the use of data on e (as Fe/sup 59 /sup -/ capture in the same mixture make it possible to determine the probability No measurable /sub He/ of /sup -/ transfer to He from the ground state of the H mesic atom. Data on e (as Fe/sup 59 /sup -/ capture, the transfer of which from mesic H is possible only from high levels, allow estimation of the probabilfty of direct H mesic atom production in the mixture. In the experiment with He/sup 3/ it was possible to evaluate directly the total probability of He mesic atom production through the yield of the reaction /sup -/ + He/sup 3/ and up to st r H/sup 3/ + and the reaction rate expected on the basis of the universal weak interaction theory. The value No measurable /sup He/ turned out to be -(1.4 450 deg C in a 3.8) 10/sup 6//sec, i.e., it cannot be considerably larger than 10/sup 6//sec, if it is in agreement with the theoretical value. This value is at least 10/sup 3/ times smaller than the tranafer rate to C and O nuclei which may be found if No measurable /sub He/ is known. The experimental data are consistent with the Z- law'' for the atomic capture probability of the mesons in gaseous mixtures H-He and H- CH/sub 3/OH. (auth)
- Research Organization:
- Joint Inst. for Nuclear Research, Dubna, U.S.S.R. Lab. of Nuclear Problems
- NSA Number:
- NSA-17-020842
- OSTI ID:
- 4694971
- Report Number(s):
- JINR-P-1168
- Country of Publication:
- USSR
- Language:
- English
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